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* Followup question - why does the existence of the self require coherence?
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* Followup questions
** Why does the existence of the self require coherence?
** A coherence theory of the self seems to rule out the possibility of a single self with multiple identities.
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* A coherence theory of the self seems to rule out the possibility of a single self adopting multiple identities.
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* Tim Bayne (2008). The Unity of Consciousness and the Split-Brain Syndrome. Journal of Philosophy 105 (6).
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# Both sides make one mind with dissociated contents. (Charles E. Marks?)
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# Both sides make one mind with dissociated contents. (Bayne?)
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* Is it possible to understand DID as failure to integrate behavioral dispositions and autobiographical memory? A coherence theory of the self seems to rule this out by definition.
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* DID might be a condition where a single subject fails to integrate behavioral dispositions and autobiographical memory.
* A coherence theory of the self seems to rule the possibility of a single self adopting multiple identities.
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!Some possible interpretations
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!!Some possible interpretations
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!!Case #1
* Argument: Subject denies denies contents of right hemisphere.
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!!Comments on these possibilities
!!!Case #1
* Argument for: Subject denies denies contents of right hemisphere.
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!!Case #2
Sperry: "two freewills in one cranial vault".
Roland Puccetti (1973) - Normal people also have two minds!
* Argument against: general remarkable integration with no obvious difference in normal situations.
!!Case #3
* If there is just one subject, how should we describe the beliefs and experiences of the subject? What is it like for the subject to perceive incompatible visual stimuli?
!!Case #4
* Nagel
to:
!!!Case #2
* Argument for: each hemisphere seems to have its own sphere of control.
** Sperry: "two freewills in one cranial vault".
** Roland Puccetti (1973) - Normal people also have two minds!
* Argument against: In normal situations, there is remarkable integration between the disconnected hemispheres and the subject is no different than a normal person. The two hemispheres do not operate independently of each other.
!!!Case #3
* Argument against: If there is just one subject, how should we describe the beliefs and experiences of the subject? What is it like for the subject to perceive incompatible visual stimuli?
!!!Case #4
* According to Nagel
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!!A self as emergent coherence
* Vertical and horizontal coherence, narrative centre
* A matter of degree
* Dennett: The self is like the centre of gravity of an object.
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!!Reply to Nagel - A self as emergent coherence
* The existence of a self depends on the coherence of mental states.
** Vertical coherence - higher-level goals, action intentions, bodily movements
** horizontal coherence - consistency of beliefs, coordination of actions
* Coherence is a matter of degree.
** Whether the self exists is a matter of degree.
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* Not clear how incompatible perceptions can belong to one mind - what is it like for the subject to perceive incompatible visual stimuli?
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* If there is just one subject, how should we describe the beliefs and experiences of the subject? What is it like for the subject to perceive incompatible visual stimuli?
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!!Case 3
* Argument against: (a) integration, (b) not clear how incompatible perceptions can belong to one mind - what is it like for the subject to perceive incompatible visual stimuli?
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!!Case #3
* Not clear how incompatible perceptions can belong to one mind - what is it like for the subject to perceive incompatible visual stimuli?
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* The two hemispheres are still linked by sub-cortical pathways.
** When pornography is shown only to the right hemisphere, the subject reports feeling differently, and one patient says "That's quite a machine you have got there."
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* The two hemispheres are still linked by sub-cortical pathways.
** When pornography is shown only to the right hemisphere, the subject reports feeling differently, and one patient says "That's quite a machine you have got there."